crypto: caam - staticize caam_get_era()

caam_get_era() is only used locally, so do not export this function
and make it static instead.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/caam/ctrl.c

@@ -400,7 +400,7 @@ static void kick_trng(struct platform_device *pdev, int ent_delay)
  * caam_get_era() - Return the ERA of the SEC on SoC, based
  * on "sec-era" propery in the DTS. This property is updated by u-boot.
  **/
-int caam_get_era(void)
+static int caam_get_era(void)
 {
 	struct device_node *caam_node;
 	int ret;
@@ -412,7 +412,6 @@ int caam_get_era(void)
 
 	return ret ? -ENOTSUPP : prop;
 }
-EXPORT_SYMBOL(caam_get_era);
 
 static const struct of_device_id caam_match[] = {
 	{

drivers/crypto/caam/ctrl.h

@@ -9,8 +9,6 @@
 #define CTRL_H
 
 /* Prototypes for backend-level services exposed to APIs */
-int caam_get_era(void);
-
 extern bool caam_dpaa2;
 
 #endif /* CTRL_H */